Description

This example is similar to the simple radio example using GNU Radio; however, this utilizes an OFDM transmitter and receiver. In this tutorial we'll also use another node as a spectrum analyzer to verify OFDM transmission.

FIXME As of March 2018, this baseline-sdr image does not have usrp drivers properly configured in sb3. —bq27

Hardware / Software Resources utilized

Grid nodes with a USRP connect via Ethernet.

baseline-sdr.ndz: disk image loaded onto nodes. This image has all the precompiled - software required to configure the USRP N210s and all the required GNU Radio software libraries. The USRP N210's interface with the node is already configured.

Set up

To get started first make a reservation on the ​Orbit Scheduler for using the Grid.

After logging into grid console, make sure all nodes are turned off

nilanjan@console.grid:~$ omf tell -a offh -t system:topo:all

Verify state of node before continuing. Make sure all nodes are in the POWEROFF state.

nilanjan@console.grid:~$ omf stat

Image the node to use as a spectrum analyzer - check ​inventory status to find a node with a USRP N210. In this example we'll use the node 19-19. Load the image baseline-sdr.ndz and then turn the node on.